Safety backup mirror



FIG. 1 is a perspective view of a safety backup mirror showing my new design;

FIG. 2 is a front elevational view;

FIG. 3 is a top plan view;

FIG. 4 is an end elevational view; and,

FIG. 5 is a bottom plan view.

The broken line showing of support elements, in FIG. 1, is for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a safety backup mirror, as shown and described. 